Add example total calories getter

app/Models/Ingredient.php

@@ -10,7 +10,7 @@ class Ingredient extends Model
     use HasFactory;
 
     /**
-     * The attributes that are mass assignable.
+     * @inheritdoc
      */
     protected array $fillable = [
         'name',

app/Models/IngredientAmount.php

@@ -11,13 +11,18 @@ class IngredientAmount extends Model
     use HasFactory;
 
     /**
-     * The attributes that are mass assignable.
+     * @inheritdoc
      */
     protected array $fillable = [
         'amount',
         'weight',
     ];
 
+    /**
+     * @inheritdoc
+     */
+    protected array $with = ['ingredient'];
+
     /**
      * Get the Ingredient this amount belongs to.
      */
@@ -31,4 +36,11 @@ class IngredientAmount extends Model
     public function recipe(): BelongsTo {
         return $this->belongsTo(Recipe::class);
     }
+
+    /**
+     * Get total calories for the ingredient amount.
+     */
+    public function calories(): float {
+        return $this->ingredient->calories * $this->amount;
+    }
 }

app/Models/Recipe.php

@@ -12,12 +12,17 @@ class Recipe extends Model
     use HasFactory;
 
     /**
-     * The attributes that are mass assignable.
+     * @inheritdoc
      */
     protected array $fillable = [
         'name',
     ];
 
+    /**
+     * @inheritdoc
+     */
+    protected array $with = ['ingredientAmounts'];
+
     /**
      * Get the Ingredient Amounts used for this Recipe.
      */

app/Models/User.php

@@ -12,32 +12,26 @@ class User extends Authenticatable
     use HasFactory, Notifiable;
 
     /**
-     * The attributes that are mass assignable.
+     * @inheritdoc
-     *
-     * @var array
      */
-    protected $fillable = [
+    protected array $fillable = [
         'name',
         'email',
         'password',
     ];
 
     /**
-     * The attributes that should be hidden for arrays.
+     * @inheritdoc
-     *
-     * @var array
      */
-    protected $hidden = [
+    protected array $hidden = [
         'password',
         'remember_token',
     ];
 
     /**
-     * The attributes that should be cast to native types.
+     * @inheritdoc
-     *
-     * @var array
      */
-    protected $casts = [
+    protected array $casts = [
         'email_verified_at' => 'datetime',
     ];
 }